Where are post indicator valves required?
Post indicator valves are generally used to control the flow of water to a sprinkler system, hydrant, or another device with underground piping.
What is a post indicator valve assembly?
An indicator post, or an indicator post valve, is a valve assembly used to open or close the water supply main to a fire protection system.
What type of valve is a post indicator valve?
What is a PIV? In short, post indicator valves (PIVs) are sturdy, above-ground access and operator valves used for automatic sprinkler systems and wet standpipe systems whose main water supply valves are located underground.
What is a PIV tamper switch?
Used to Detect Tampering or Setting Changes on Control Valve, by Monitoring Open/Closed Position; Durable Metal Enclosure with Single-Side Entry for Conduit; Adjustable Actuator Length; Two SPDT Synchronized Switch.
What is the unique feature of a post indicator valve?
The post-indicator valve has several important features – first is the ability to quickly shut the valve with use of the post indicator valve handle. The second is to quickly see whether the system is in the ‘open’ or ‘shut’ condition in a protected enclosure.
What is a yoke on an OS and Y?
OS&Y means “outside screw and yoke” The designation has to do with the location of the screw nut and the shaft screw threads. In this style, the screw nut is supported by an A-frame type “yoke” outside of the enclosed body of the valve.
What is the function of OS&Y valve?
An OS&Y valve (outside screw & yoke) functions by opening and closing via a gate, which lowers both in and out of the valve. When the handle is turned clockwise the gate will close preventing any water from traveling through the valve.
What is OS & Y valve?
One type of valve commonly used to control water flow to fire sprinkler systems is known as an OS&Y gate valve. OS&Y means “outside stem and yoke” or “outside screw and yoke”. OS&Y gate valves operate by opening and closing via a gate, which lowers into or rises out of the valve.
What does S and O mean on a gate valve?
April 2012. One type of valve commonly used to control water flow to fire sprinkler systems is known as an OS&Y gate valve. OS&Y means “outside stem and yoke” or “outside screw and yoke”. OS&Y gate valves operate by opening and closing via a gate, which lowers into or rises out of the valve.